Knife sharpening device

ABSTRACT

A knife sharpening device is disclosed. The device an elongated body with cornered edge on the surface thereof characterized in that at least one corner of the device is a cornered slot extended axially and the connection between the top end of the two walls of the cornered slot with the circumferential surface forms into a first sharpening edge and a second sharpening edge, and the first and the second sharpening edge are in contact with the edge of a knife.

BACKGROUND OF THE INVENTION

(a) Technical Field of the Invention

The present invention relates to knife sharpening device, and inparticular, a knife sharpening device which is used to sharpen both ofthe edge of a knife.

(b) Description of the Prior Art

FIGS. 1 and 2 show conventional knife sharpener which is generally acylindrical sharpening rod 10. The surface of the rod 10 is a polishingsurface 15 which is used to sharpen the edge of the knife 1 in thecourse of knife sharpening. The drawback of such sharpening rod 10 isthat the efficiency of sharpening a knife is poor.

FIGS. 3 and 4 shows a conventional knife sharpening device 20 publishedin Taiwan Patent Publication No. 368921. The knife sharpening device 20has a handle 21 with a front end being a polygonal shape tungsten-steelplate 25. The corners of the tungsten-steel plate 25 are the sharpeningcorners 26 for use in maintaining the sharpness of the edge 1 of aknife. Such conventional knife sharpening device can enhance thesharpening efficiency, however, only one sharpening corner 26 can beused and therefore, the applicability of this conventional device 20 isnot restricted. Further, the wear out of the sharpening corner 26 is toofast, therefore, the longevity of the conventional sharpening device isshort.

In view of the above drawback, it is an object of the present inventionto provide a knife sharpening device which could overcome the drawbacksas stated.

SUMMARY OF THE INVENTION

The primary purpose of the present invention is to provide a knifesharpening device having an elongated body with cornered edge on thesurface thereof, characterized in that at least one corner of the deviceis a cornered slot extended axially and the connection between the topend of the two walls of the cornered slot with the circumferentialsurface forms into a first sharpening edge and a second sharpening edge,and the first and the second sharpening edge are in contact with theedge of a knife.

Yet another of the present invention is to provide a knife sharpeningdevice, wherein at least one end of the sharpening device is aconverging conic for sharpening the edge of a small knife.

Another further object of the present invention is to provide a knifesharpening device which is a cylindrical elongated body, characterizedin that the circumferential edge of the device has at least a sectionalslot which is axially extended, and the connection between the top endof the two lateral wall of the sectioned slot forms into a firstsharpening edge and a second sharpening edge, and the first and thesecond sharpening edge can contact with the first edge of a knife at thesame to sharpen the knife.

The foregoing object and summary provide only a brief introduction tothe present invention. To fully appreciate these and other objects ofthe present invention as well as the invention itself, all of which willbecome apparent to those skilled in the art, the following detaileddescription of the invention and the claims should be read inconjunction with the accompanying drawings. Throughout the specificationand drawings identical reference numerals refer to identical or similarparts.

Many other advantages and features of the present invention will becomemanifest to those versed in the art upon making reference to thedetailed description and the accompanying sheets of drawings in which apreferred structural embodiment incorporating the principles of thepresent invention is shown by way of illustrative example.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a perspective view of a sharpening rod conventionally used forsharpening knives.

FIG. 2 is a sectional schematic view showing a conventional sharpeningrod being applied to sharpen a knife.

FIG. 3 is a perspective view showing the application of the conventionalsharpening rod in sharpening a pair of scissors.

FIG. 4 is a schematic view showing the sharpening corner in contact withan object to be sharpened.

FIG. 5 is a perspective view of the sharpening device in accordance withthe present invention.

FIG. 6 is a schematic sectional view showing the sharpening between thesharpening corners of the sharpening device of the present invention.

FIG. 7 is a perspective view of another preferred embodiment of thepresent invention.

FIG. 8 is a schematic sectional view showing the application of thesharpening device shown in FIG. 7 of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

The following description are of exemplary embodiment only, and are notintended to limit the scope, applicability or configuration of theinvention in any way. Rather, the following description provides aconvenient illustration for implementing exemplary embodiments of theinvention. Various changes to the described embodiments may be made inthe function and arrangement of the elements described without departingfrom the scope of the invention as set forth in the appended claims.

Referring to FIGS. 5 and 6, there is shown a knife sharpening device 70which is a cornered elongated body having a first and a second end. Thefirst end can be mounted with a handle (not shown), and the second endhas a converging sloping section 78 for use on the edge 1 of a smallknife.

In accordance with the present invention, at least one corner of theknife sharpening device 70 has a cornered slot 71 which extends axially,and the connection between the top end of the side of the corner slot 71and the circumferential surface form into a first sharpening edge 75 anda second sharpening edge 76. The first and the second sharpening 75, 76can contact closely with the edge 1 of the knife, as shown in FIG. 6 sothat the first and second sharpening edge 75, 76 can sharpen the edge 1of a knife.

Accordingly, the present knife sharpening device improves sharpeningefficiency in sharpening a knife or the like.

The application of the knife sharpening device is shown in FIG. 6. Thefirst sharpening edge 75 and the second sharpening 76 at the lateralsides of any of the cornered slot 71 of the knife sharpening device 70are at the same time in contact with the edge 1 of a knife and the firstand second sharpening edge 75 and 76 are moved to and fro to sharpen theedge 1 of the knife. Due to the dual polishing action of the sharpeningedge 75, 76, the efficiency of sharpening a knife is improved.

In another preferred embodiment, as shown in FIGS. 7 and 8, the knifesharpening device is a cylindrical rod and the circumferential edge ofthe rod is provided with at least one sectioned slot 51 and thesectioned slot 51 is extended axially, and the connection between thetop end of the two lateral walls of the sectioned slot 51 and thecircumferential edge is formed into a first sharpening edge 55 and thesecond sharpening edge 56, wherein the first sharpening edge 55, 56 canat the same time in contact with the edge of the knife 1, as shown inFIG. 8, such that the first and second sharpening edge 55, 56 can at thesame time sharpen the edge 1 of the knife in to and fro movement.Furthermore, at least one end of the knife sharpening device 50 has aconverging conic section 58 for application on the edge of a smallerknife. The efficiency of sharpening on the edge of knife issignificantly improved as compared to the conventional knife sharpeningdevice.

In a preferred embodiment, the shape of the knife sharpening device is afour cornered elongated body.

It will be understood that each of the elements described above, or twoor more together may also find a useful application i other types ofmethods differing from the type described above.

While certain novel features of this invention have been shown anddescribed and are pointed out in the annexed claim, it is not intendedto be limited to the details above, since it will be understood thatvarious omissions, modifications, substitutions and changes in the formsand details of the device illustrated and in its operation can be madeby those skilled in the art without departing in any way from the spiritof the present invention.

1-4. (canceled)
 5. A knife sharpening device having an elongated bodyhaving a first end and a second end wherein said second end has aconverging sloping section, said elongated body having four slotsextended axially and connection between a top edge of said slots andcircumferential surface of said elongated body forming eight sharpeningedges.